JPH0340982Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to an improvement of an auxiliary device for concrete pouring, and in particular to an auxiliary device for concrete pouring that removably fixes a column and a base with mounting screws, so that the base can be removed from the column after construction. It is.

[Prior art and its problems]

BACKGROUND ART The task of leveling the surface of concrete, such as floor concrete, is a difficult task even for specialized craftsmen. In the past, we first stretched strings above the construction surface, then piled up mortar on the construction surface using the strings as a reference to create a mark for the construction thickness, and poured concrete while hitting this mark. However, this method was time-consuming and difficult to achieve levelness even by highly skilled craftsmen. For this reason, when drying the concrete, water collects in the recessed areas of the floor, resulting in the inconvenience that drying is not uniform. As a means to solve this problem,
No. 50338 proposes a "slab leveling jig that also serves as an insert." The jig consists of a support member having a receiving part rotatable around an axis at the upper end, a level adjustment shaft having a male threaded part at the lower part, and a female threaded part that is screwed into the male threaded part in the vertical direction. It consists of a pedestal with an outwardly protruding flange integrally formed on the lower end surface of a long nut that penetrates through it, and a level adjustment shaft is screwed into the long nut. Then, fix the pedestal by nailing the collar to the formwork, adjust the height by stretching a pipe, etc. over the holder, and adjust the height with a ruler, etc. using the pipe as a guide. This allows the slab surface to be finished quickly. In addition, a screw part is formed on the bottom side of the pedestal fixed to the formwork, and after the formwork is removed, the pedestal functions as an insert, and can be used as a hanging rod when constructing a ceiling below the floor slab. This will be the attachment part. However, this conventional jig had the following problems. That is, the pedestal serving as the insert is fixed to the formwork by nailing the flange provided integrally with the long nut using nails or the like. Therefore, when the formwork is removed after the concrete has hardened, the lower surface of the flange is exposed on the lower surface of the floor slab. In this case, when the lower surface of a floor slab is used as a ceiling, rust tends to float even if the surface is beautifully finished by spraying, etc., and even if the rust does not float, the finish of the ceiling surface remains unnatural. In addition, the nails used for fixing still remain protruding from the lower surface of the flange and must be cut, which is a cumbersome and time-consuming task.

[Purpose of invention]

Therefore, the purpose of this invention is to make it possible to remove the exposed part on the underside of the floor slab when the formwork is removed after the concrete hardens, thereby preventing rust from protruding on the underside of the floor slab and when fixing auxiliary equipment. To provide an auxiliary tool for concrete pouring which prevents nails, etc. used for the floor slab from sticking out and remaining on the lower surface of the floor slab, and which does not give a sense of discomfort when the lower surface of the floor slab is finished.

[Structure of the idea]

The structure of the present invention taken to achieve the above object is as follows. That is, the present invention comprises: a base; a support that is made up of two or more members and is erected on the base and whose height is adjustable; The concrete casting auxiliary device is equipped with a mounting body capable of mounting; a mounting hole is provided through the base, a female screw portion is provided at the lower part of the support body, and the lower surface of the base is The concrete pouring aid is characterized in that a mounting screw is inserted into the mounting hole from the side, and the support column and the base are removably fixed to each other by the mounting screw. Steel is the material for concrete pouring aids.
Examples include stainless steel and plastic. The means for attaching the base to the formwork of the floor slab can be set arbitrarily, such as nailing or forming an arbitrary number of peaks on the base and nailing them in place. The mounting body is for mounting the guide member, and its shape is preferably compatible with the shape of the abutting portion of the guide member. For example, when a pipe is used, it is formed into a V-shape, a U-shape, etc. The height adjustment structure of the support column is preferably a screw type that allows stepless adjustment, but other structures may be used as long as adjustment can be made easily, and the structure is not particularly limited.

Embodiments The present invention will be explained in more detail based on embodiments shown in the drawings. FIG. 1 is a partially cutaway exploded perspective view of one embodiment, and FIG. 2 is a perspective view of the assembled state. Note that the same or equivalent parts are indicated by the same reference numerals. Reference numeral 1 denotes a concrete pouring auxiliary device, which includes a support 10 made of iron, a mounting body 11 made of plastic, and a base 32. The strut body 10 includes an elevating rod 15 having a male threaded portion 12 carved in its lower part, and a long nut 33 screwed into the elevating rod 15. The shape of the mounting body 11 is generally V-shaped or U-shaped.
Although it is formed in a letter shape, other shapes may be used as long as the guide member G, which will be described later, does not fall off. Note that if the mounting body 11 is formed into a wide U-shape, the guide members G can be mounted side by side, which is convenient when the guide members G are connected vertically. A small diameter portion 150 having a stepped portion is formed at the upper end of the lifting rod 15. Also,
A fitting recess 110 that loosely fits into the small diameter portion 150 is formed in the lower part of the mounting body 11 so that the mounting body 11 can rotate when it is fitted to the upper end of the lifting rod 15, and the fitting recess 110 is designed to be able to rotate between the mounting body 11 and the lifting rod 15. The outer surface of the mounting body 11 is made to be flush with each other. The structure of the connecting portion between the mounting body 11 and the lifting rod 15 is such that a circumferential groove is formed in the lifting rod 15, and a fitting recess 1 of the mounting body 11 is formed.
A structure in which a spring that fits into the circumferential groove is provided in the 10, etc.
Various means can be adopted arbitrarily. The long nut 33 has a male threaded portion 12 of the lifting rod 15 and a female threaded portion 31 for screwing a mounting screw 39 described later, extending in the axial direction. As a result, the long nut 33 is removably fixed to the base 32 by the mounting screw 39 and is erected. A notch 34 is formed on the circumferential surface of the long nut 33, and the long nut 33 is attached to the base plate 3 using a mounting screw 39.
2, the long nut 33 can be fixed with a spanner or the like. The base plate 32 is formed into a thick plate shape with a lower surface slightly wider than an upper surface, and a mounting hole 36 is provided through the central portion. The mounting hole 36 is formed in a truncated conical shape so that the head of the mounting screw 39, which is a countersunk screw, can be accommodated, and a circular reinforcing portion 320 is formed at the periphery of the mounting hole 36 on the upper surface of the base 32. ing. Nail holes 321 are provided at four locations on both ends of the base 32.
is provided. As shown in FIG. 2, the concrete pouring aid 1 has a long nut 33 erected on a base 32 with mounting screws 39, and a lifting rod 33 with a mounting body 11 attached to the upper end of the long nut 33. 15 is assembled by screwing the male threaded portion 12 onto the female threaded portion 31. Incidentally, since the long nut 33 and the lifting rod 15 are screwed together, the height of the mounting body 11 can be finely adjusted. Alternatively, the upper part on the long nut 33 side may be male threaded, and the lifting rod 15 side may be female threaded. Reference numeral 20 denotes a tightening nut, which has a threaded part 21 formed in the center thereof to be threadedly engaged with the male threaded part 12. After setting the height of the lifting rod 15, the lifting rod 1
5 can be tightened and fixed to a long nut 33. Fig. 3 is an explanatory diagram showing how to use the concrete pouring aid according to this embodiment, Fig. 4 is a sectional view of the main part showing the construction state, and Fig. 5 is a sectional view of the main part showing the state in which the hanging rod is attached. It is a diagram. The method and operation of constructing a floor slab using the concrete casting auxiliary device 1 according to this embodiment will be explained with reference to FIGS. 3 to 5. A base 32 is nailed to required locations on the formwork 55 of the floor slab with nails 30, and an arbitrary number of concrete placement auxiliary tools 1 are fixed. The guide member G is placed on the mounting body 11 and spanned between the concrete pouring auxiliary tools 1. Note that the guide member G may have any shape as long as it has a straight portion of a required length, but generally it is preferably a rod, a pipe, or the like, and is preferably made of metal with high rigidity. A string 50 is stretched along the guide member G to serve as a reference for the height of the construction surface. The horizontality or inclination of the guide member G is adjusted by turning the lifting rod 15 of the support column 10 with the string 50 as a reference. In this case, since the mounting body 11 is rotatably attached to the upper end of the lifting rod 15, the height of the support column 10 can be adjusted without removing the guide member G. Once the height of the strut body 10 is determined, tighten the nut 2.
0 to fix the lifting rod 15 to the long nut 33. Pour concrete slightly higher than guide member G. Excess concrete is shaved off along the guide member G using a plate body 60 having a straight portion. Remove guide member G from the construction surface and level the entire surface. By the above construction method, it is possible to construct a floor slab 57 having a substantially accurate horizontal or inclined surface. After the floor slab 57 is constructed, when the lower formwork 55 is removed, the back surface of the base 32 is exposed together with the mounting screws 39. Loosen the mounting screws 39 and remove the base 32 from the buried support 10. Foundation 3
2, a recess is created on the lower surface of the floor slab 57, but by filling this recess with mortar or a repair agent, the ceiling surface can be finished flush. Furthermore, since the support column 10 is buried in a recess, rusting can be suppressed even if it is made of metal. In addition, as shown in FIG. 5, it is possible to attach the hanging rod 56 for constructing the ceiling by screwing it onto the long nut 33. In that case, anchor work for attaching the hanging rod 56 is not required. Become. FIG. 6 is a partially cutaway exploded perspective view showing another fitting structure between the lifting rod and the mounting body. In this embodiment, unlike the embodiment shown in FIG. 1, a step portion with a small diameter is not formed at the upper end of the lifting rod 15a. Instead, the lower part of the mounting body 11a has a fitting recess 11 that can fit with the upper end of the lifting rod 15a.
0a is formed so that the mounting body 11a can rotate when fitted. Note that the pouring aid according to the present invention can also be used when constructing a first floor floor slab.
In that case, it is possible to fix the base 32 to the ground by driving nails 30 into the ground, but it is also possible to use one with deformed reinforcement R welded to the countersunk part of the mounting screw 39, or one with reinforcing bar welded to the bottom surface of the base 32. It is also possible to fix it by driving deformed reinforcement R or reinforcing steel into the ground. Note that the present invention is not limited to the illustrated embodiment, and many modifications can be made within the scope of the claims of the utility model registration.

[Effect of the idea]

A conventional concrete pouring aid consists of a pedestal with an outwardly projecting collar integrally formed on the lower end surface of a long nut. For this reason, when the formwork is removed after the concrete has hardened, the bottom surface of the collar will be exposed on the bottom surface of the floor slab, and if the bottom surface of the floor slab is used as a ceiling, rust will occur even if the surface is beautifully finished by spraying etc. The rust tends to come off easily, and even if the rust doesn't come off, the finish on the ceiling surface still looks strange.Furthermore, the nails used to secure the mold to the formwork still stick out from the bottom of the flange, so they need to be cut. However, the disadvantage was that the work was troublesome and required extra effort. However, according to the present invention, a mounting hole is provided through the base, and a female thread is provided at the bottom of the support column, and the mounting screw is inserted into the mounting hole from the bottom side of the base. and the base are removably fixed to each other by the mounting screws. Therefore, after the concrete hardens, the base exposed on the lower surface of the floor slab when the formwork is removed can be easily removed from the buried support pillars. This can prevent rust from appearing on the underside of the floor slab, and nails used for fixing auxiliary equipment from remaining stuck out from the underside of the floor slab. Note that although recesses are created by removing the base, filling the created recesses with mortar or a repair agent will make the ceiling surface less unsightly and will not create a sense of discomfort when the lower surface of the floor slab is finished as a ceiling surface. Furthermore, when constructing a ceiling below a floor slab, a hanging rod can be attached by screwing into a support column buried in the floor slab. Furthermore, the removed base can be used any number of times, so there is no waste. It has remarkable effects such as

[Brief explanation of drawings]

Figure 1 is a partially cutaway exploded perspective view of one embodiment;
The figure is a perspective view of the assembled state, Figure 3 is an explanatory diagram showing how to use the concrete pouring aid according to this embodiment, Figure 4 is a sectional view of the main part showing the construction state, and Figure 5 is the hanging rod. FIG. 6 is a partially cutaway exploded perspective view showing another fitting structure between the lifting rod and the mounting body. DESCRIPTION OF SYMBOLS 1... Concrete pouring auxiliary device, 10... Support body, 11... Placement body, 15... Lifting rod, 3
3...Long nut, 32...Base, 39...Mounting screw.

Claims (1)

[Claims for Utility Model Registration] A base 32; a support 10 which is made up of two or more members and is erected on the base and whose height is adjustable; A concrete pouring auxiliary device comprising mounting bodies 11 and 11a that are rotatable about the axis of the concrete casting auxiliary device, and a mounting hole 36 is provided through the base 32,
A female threaded portion 31 is provided at the lower part of the support column 10, and a mounting screw 3 is inserted into the mounting hole from the bottom side of the base.
1. A concrete pouring auxiliary device, characterized in that the support column and the base are removably fixed to each other by the mounting screws.